var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser')
var cors = require('cors');
var session = require('express-session');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var registerRouter = require('./routes/register');
var mongoRouter = require('./routes/mongo');
var loginRouter = require('./routes/login');
var useSessionRouter = require('./routes/useSession');
var sessionLoginRouter = require('./routes/sessionLogin');
var proxyDTRouter = require('./routes/proxyDT');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
// session 配置的必要参数
app.set('trust proxy', 1); // trust first proxy
// session 属性配置
app.use(session({
  secret: 'keyboard cat',
  resave: false,
  saveUninitialized: true,
  cookie: { maxAge: 60000000 } // 最大存储时间，单位为 s
}));

// credentials: true 允许 cookie 跨域 , 并且 origin 不能为 * ，origin 默认是为 * 的
app.use(cors({ credentials: true, origin: 'http://42.193.117.107' }));
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/register', registerRouter);
app.use('/options', mongoRouter);
app.use('/login', loginRouter);
app.use('/session', useSessionRouter);
app.use('/slogin', sessionLoginRouter);
app.use('/dt', proxyDTRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
